[QUESTION] Create record and relation with related entity with single mutation (Many to Many)

[pratiksyngenta]

Setup:

NestJs
TypeOrm
Nestjs-Query
PostgreSQL

I understand, when specifying a @OffsetConnection relation a couple of endpoints will automatically be generated. In this example the following are generated.
ie. => addSubTasksToTodoItem - A mutation to add SubTasks to a TodoItem

How can I create record and relation with related entity with single mutation (Many to Many relationship)?

I was thinking of using hooks, but I think all of the hooks are all @ Before[operation] so it would not help [as id would be generated after insert which we need to create relation entry]